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Old 05-09-2011, 09:59 PM   #1
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Join Date: Oct 2010
Posts: 10
Unhappy Check Engine Light

Took in my 2011 Forest River Berkshire diesel pusher with a Cummins ISB6.7 engine into Camping World for its first oil change at 4,000 miles. I like to make the first oil change early to remove any metallic particles or other debris from the lubricating system. The oil filter and oil was changed and the oil levels were dipped and proved to be normal, right at the full mark.

The drive from Camping World to the storage lot (6 miles) was uneventful and oil pressre was at 50 psi (30 psi is the minimum) and no warning lights on. This last weekend on a short drive from the storage yard to my home (2 miles) to do some cleaning and prepping for our 5 week vacation, I noticed the check engine light came on when the engine rpm went down to idle with oil pressure at still at 50 psi. When engine rpm increased (pressure still at 50 psi) the light went out. I re dipped the oil and it was at the full mark. The same thing happened again on the way back to the storage yard.

The owners manual indicates that the light on indicated the need for service. I cannot figure out what is happening with this and any help would be most appreciated.


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Old 05-10-2011, 12:02 AM   #2
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Join Date: Sep 2009
Posts: 755
There are many things that can trigger the check engine light to come on, probably coincidence that it happened just after the oil change.

You can go to most parts stores and they can read the codes, or you can take it to the dealer, sounds like your rig is new so if you take it to the dealer they can address the issue as they read the codes. A lot of the time they involve cam sensors which can be pricey to replace (mostly labor) but if it's under warranty you are in luck.
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Old 05-12-2011, 07:38 AM   #3
2011 Berkshire 390bh
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Join Date: Jul 2009
Location: Western NY State
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Fred, we always take any chassis or engine issues to our local Freightliner dealer. They know what to do and how to do it.
2011 Berkshire 390bh
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Old 05-12-2011, 07:50 AM   #4
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Check to be sure the fuel fill caps are on tight! Don't ask me how I know to check that.
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